Friction-modifying additives for slideway lubricants
A friction-modifying additive composition for a slideway lubricant comprising a mixture of at least one polymeric ester of certain dibasic and monobasic acids with selected organo phosphorus compounds.
Claims
1. A slideway lubricant additive composition consisting essentially of:
- (a) at least one polymeric ester of a mixture of dibasic and monobasic acids wherein each acid contains 5 to 22 carbon atoms and wherein the ester group is an aliphatic group and wherein the resultant polymer has a weight average molecular weight (M.sub.w) from about 50,000 to 3,000,000 and having an Acid Number of about 0.5 to about 30;
- (b) at least one organo phosphorous compound selected from the group consisting of dialkyl hydrogen phosphites, trialkyl phosphites, aryl organo phosphites, alkyl-aryl phosphates, and alkyl amine salt of organo phosphoric acid; and
- (c) a sufficient coupling agent amount of petroleum oil to contain (a) and (b) in a solution; wherein the weight ratio of said polymeric ester to said organo phosphorus compound is from about 2:1 to about 12:1 and wherein said viscosity of said petroleum oil is ISO-22 to ISO-680.
2. The additive composition of claim 1 wherein said polymeric ester is a mixed ester of more than one monobasic acid with one dibasic acid.
3. The additive composition of claim 1 wherein each acid in (a) contains 6 to 18 carbon atoms.
4. The additive composition of claim 1 wherein polymeric ester has a M.sub.w of about 150,000 and an Acid Number of about 16 to 24 and is a pentaerythritol initiated polymer of a mixture of stearic acid, coconut fatty acids and adipic acid.
5. The additive composition of claim 1 wherein said polymeric ester has a M.sub.w from about 1,500,000 to about 2,500,000 and an Acid Number from about 0.5 to about 3.
6. The additive composition of claim 1 wherein said polymeric ester has a M.sub.w of 2,100,000, an Acid Number of 0.5 to 3 and is a pentaerythritol initiated polymer of a mixture of coconut fatty acids and adipic acid.
7. The additive composition of claim 1 wherein said organo phosphorus compound is an alkyl amine salt of an organo phosphoric acid.
8. The additive composition of claim 7 wherein said alkyl amine salt of an organo phosphoric acid is a mixture of tridecyl phosphate and branched 3-tridecyloxy-1-propanamine.
9. The additive composition of claim 1 wherein the weight ratio of polymeric ester to phosphoric compound is from 4:1 to about 8:1.
10. The additive composition of claim 1 wherein the petroleum oil has a viscosity of ISO-22 to ISO-220.
11. The additive composition of claim 1 wherein the amount of said petroleum oil in said additive composition is from about 10% to about 70% by weight of the additive composition.
12. A slideway lubricant composition comprising a lubricant base stock and about 0.75% to about 4% by weight of the additive composition of claim 1.
13. The slideway lubricant composition of claim 12 further comprising a tackifier.
14. The slideway lubricant composition of claim 13 wherein said tackifier is oil-solubilized polyisobutylene.
15. The slideway lubricant composition of claim 13 wherein said tackifier is present in an amount from 0.25% to about 4%, based on the total weight of the slideway lubricant.
4061581 | December 6, 1977 | Leleu et al. |
4116877 | September 26, 1978 | Outten et al. |
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5151205 | September 29, 1992 | Culpon, Jr. |
5360565 | November 1, 1994 | Junga |
- Elco 313 slideway lubricant additive product brochure--The Elco Company, Cleveland, Ohio--Jan., 1993. Gateway Additive Co. product brochure entitled "Stability of SYN-ESTER and ADDCO Esters"--Sep., 1992. Gateway Additive Co. product brochure entitled "SYN-ESTER GY Series"--Oct., 1992. Gateway Additive Co. product brochure entitled "SYN-ESTER.RTM. GY-35 and GY-500"--Apr., 1995. Gateway Additive Co. product brochure entitled "ADDCO 360-P"--Oct., 1992.
Type: Grant
Filed: Aug 30, 1996
Date of Patent: Aug 25, 1998
Assignee: Gateway Additive Company (Spartanburg, SC)
Inventors: William Brannen (Westlake, OH), Aaron Myers (Spartanburg, SC), Harish Patel (Spartanburg, SC), Philip R. Miller (Spartanburg, SC)
Primary Examiner: Margaret Medley
Attorney: William A. Wiggin & Dana Simons
Application Number: 8/705,614
International Classification: C10M14102; C10M14106; C10M14110;